Chemical car-warmer



'(No Model.)

0. MITCHELL.

CHEMICAL OAR'WARMER. No. 295,576. v Patented Mar. 25, I884,

WIT $83586? jaqveaorfqr:

holes in the casing.

UNITED STATES PATENT O FicE.

CLIFFORD MITCHELL, OF CHICAGO, ILLINOIS.

CHEMICAL CAR-WARMER.

SPECIFICATION forming part of Letters Patent No. 295,576, dated March 25, 1884-.

Application filed February 16, 1883. (No model.)

To all whom, it may concern.-

Be it known that I, CLIFFORD MITCHELL, residing at Chicago, in the county of Cook and State of Illinois, and a citizen of the United States, have invented new and useful Improvements in Chemical Car-Warmers, of which the following is a full description, reference being had to the accompanying drawings, in which Figure l is a longitudinal vertical section of a vessel suitable for use in a street or other car or similar vehicle. Fig. 2 is a top or plan View; Fig. 3, an end elevation.

The object of my invention is to establish, regulate, and maintain heat in streetcars, railway-carriages, or other vehicles by storing up the heat. contained in steam by means of such ZIPPHTIEFEIITZTS'WIH retain and utilize the said heat, and emit, conduct, and radiate itin certain directions or toward certain parts.

In the'drawings, A indicates the box, case, or receptacle; B, a division-plate or false bottom,- C, apertures in the box or casing; C, caps or covers for the apertures C; D, coil or coils of steam-pipe; D, a coupling or branch; E, a non-conducting-filling or lining; F, handle or handles.

The box or casing A is made of sheet iron, that which is galvanized or tinned being preferred, and it is made in proper form to go under a car-seat, so as to be out of the wa and when they are made to remain they are each fitted to their places. When they are removable, they are made in the form shown, or other form, so as not to be tooheavy for handling, and in this portable form, if the pipe or coil D is branched, the branches D will be placed inside, to avoid the additional openings or When these cases are fixtures, theconpling D is extended through the car, so that it may be connected by means of flexible hose or jointed pipes with a suitaably-located steam-generator or fixed steampipe; or the coupling D will be placed in front, so that the connecting hose or pipe may be brought through the door.

To obtain the heat necessary for warming street-cars or other vehicles, steam, superheated or otherwise, is passed from a generator or out of the vehicle into the apparatus. The case is filled around the coil with a mixture of sodaic salts in about the proportion of one ame hyposulphite to ten parts of the acetate. The case or warmth-reservoir is provided on its top face with two or more apertures, each of which may be closed by tightlyfitting caps of metal or other suitable material. On the bottom or back of the warmth-reservoir, or both, as may be deemed neceessary, are provided compartments formed by the division-plates B, which compartments are filled with sand or other non-conducting substance. Instead of compartments, simple linings may be used. The steam being let into the coil passes by means of the coil through the easilyfusible mixture of sodaic salts, which are fused by the heat contained in the steam. WVhen the aforesaid salts are fused,the steam or other heating medium is shut off and the fused mass allowed to cool, the heat given off from it being emitted, conducted, and radiated in directions most necessary, and in directions contrary to the sides lined or provided with compartments filled with non-conductin g material, the metallic caps Cbeing removed, if deemed necessary, and by making one opening C, or

one group of openings, slightly higher than the others a circulation of air may be had through the warmer, and in contact with the filling. When the fused mass has so cooled down as to be of diminished value as a source ofheat.

steam is again admitted at the orifice and the substance again fused.

What I claim as new, and desire to secure by Letters Patent, is as follows:

The combination of a case, warmth emitting chemicals therein, openings for providing a direct circulation of air through the case in direct contact with the chemicals, and means for fusing the chemicals, substantially as described.

CLIFFORD MITCHELL.

Witnesses:

7M. M. LUFF, L. M. LUFF. 

